llms.txt — definition & why it matters | BrandGEO Glossary   llms.txt
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 A proposed standard file that gives AI crawlers a curated, markdown map of your site.

llms.txt is a convention (proposed at llmstxt.org) where a site publishes a plain-markdown file at /llms.txt that lists its most important pages with short descriptions, plus optionally a /llms-full.txt containing the full content corpus. It gives LLM-based crawlers and agents a token-efficient, noise-free way to understand a site instead of parsing navigation-heavy HTML.

Adopting llms.txt costs little and signals AI-friendliness: pair it with markdown versions of key pages and correct robots.txt rules for AI crawlers (GPTBot, ClaudeBot, Google-Extended and friends) so engines can actually read what you want them to cite.

Related terms
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 [ Generative Engine Optimization (GEO) ](https://brandgeo.co/glossary/generative-engine-optimization) [ AI crawlers ](https://brandgeo.co/glossary/ai-crawlers) [ Structured data for AI (JSON-LD) ](https://brandgeo.co/glossary/structured-data-for-ai) 

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